stal'aein, to drop—stalactite, stalagmite.
stel'lein, to send—apostle, apostolic, epistle, epistolary.
sten'os, narrow—stenography.
sthen'os, strength—calisthenics.
stig'ma, a mark—stigma, stigmatize.
strat'os, an army—stratagem, strategy, strategist.
stroph'e, a turning—apostrophe, catastrophe.
ta'phos, a tomb—epitaph, cenotaph.
tau'to, the same—tautology.
tek'ton, a builder—architect.